Practical: Litthing lockable profile copier is a good helper for carpenters. The contour gauge can duplicate the shape instantly. No need to transfer profiles to paper or cardboard, saving you a lot of free time. Simply press the contour gauge on the tile ruler to take the guesswork out of irregularly shaped dimensions. Great Value: The measuring tool can be used to locate profiles or edges and accurately transfer to the material to be cut. The contour gauge is designed for wrapping pipes, circular frames, conduits, etc. Suitable for copying curves and a variety of contours suitable for home and shop.Long Service Life: The scribing tool is made of good quality ABS plastic, high strength, rust-proof and durable; plastic does not rust conforms to shape and maintains pattern. If you have any questions, please feel free to contact us.Double Scale: Contour duplicator with inch and centimeter graduations on the gauge's strong, durable plastic body. This jig also has ruler markings on the tool body in 1 inch and 1 inch increments, meets all your measuring needs. Note: Data are all measurements Manual, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received.